One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6)(7,10)(8,12)(9,11)(13,14,16,18)(15,17,19,20)(21,22,26,28)(23,29,30,33)(24,25,34,36)(27,35,31,32)(5,7,9,8)(6,10,11,12)(13,15,16,19)(14,17,18,20)(21,23)(22,27)(24,33)(25,35)(26,30)(28,31)(29,34)(32,36)(5,8,9,7)(6,10,11,12)(15,19)(17,20)(22,28)(23,30)(24,34)(32,35)(2,4)(21,24,25,28,26,34,36,22)(23,31,32,33,30,27,35,29)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.